Malicious PDF — malware analysis report

Static analysis result for SHA-256 ff9d727939fa420e…

MALICIOUS

PDF

40.2 KB Created: 2020-10-16 09:54:02 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-10
MD5: 1f7e9e7cdb4c7f3fb15da1c16544218c SHA-1: 40d8d10cca3e1b12a8bed7caef1f7fe0b1d18abe SHA-256: ff9d727939fa420edaa3bbf811b8c9f232a91331476531e0d0f12420c02d80b6
194 Risk Score

Machine Learning

  • Nyx PDF Classifier malicious score 1.0000

Heuristics 5

  • PDF links to known malicious redirector infrastructure critical PDF_MALICIOUS_REDIRECTOR_LINK
    PDF contains a clickable URI to redirector infrastructure used by a known malicious PDF SEO/adware delivery campaign. These documents typically rely on user interaction and redirect chains rather than a PDF parser vulnerability.
  • Small PDF contains mass external PDF link farm critical PDF_SEO_LINK_FARM
    Small PDF contains many clickable external PDF links, mostly clustered on one host. This matches generated SEO/link-farm PDF carriers used to route users into malicious or unwanted-software delivery chains, rather than a normal document citation pattern.
  • Image lure linking to an SEO redirector (free-download phishing) high PDF_SEO_UTM_REDIRECTOR_LINK
    PDF embeds an image with little or no body text and a clickable link to a multi-word utm_term / FeedBurner-proxied SEO redirector — the 'free ebook / solution-manual / document download' phishing family that ranks for natural-language search queries and routes the user into a payload/redirect chain. The PDF carries no exploit; the risk is the linked destination. Flagged structurally (image lure + SEO redirector) so it does not depend on a ClamAV/ML signature, and regardless of how many filler text pages the lure carries.
  • Object number defined twice with different bodies info PDF_DUPLICATE_OBJ_BODY_INCREMENTAL
    The same indirect object (N G) is defined more than once with different body bytes. First-wins and last-wins readers will resolve different content, which is a parser-confusion shape used by targeted PDFs. Body-only differences are common in benign incremental updates, so severity is raised only when the duplicate carries active content.
  • Embedded URL info EMBEDDED_URL
    One or more URLs were extracted from the document. The URL itself is not a detection — see the per-URL labels for which channel (macro, JS, link annotation, document body, ...) reached each URL.
    URL https://ttraff.club/pify?keyword=truck+simulator+pro+europe+apk+obb In PDF document text
    • https://pumowurunumig.weebly.com/uploads/1/3/2/7/132740285/b37f31.pdfIn PDF document text
    • https://rutaluxunenore.weebly.com/uploads/1/3/0/7/130740368/juzet.pdfIn PDF document text
    • https://wepugimi.weebly.com/uploads/1/3/1/0/131070973/xowirokagejewu_xorikuno_tidipawane_xorisomeni.pdfIn PDF document text
    • https://guwomenod.weebly.com/uploads/1/3/0/8/130873843/ligewajinaxi.pdfIn PDF document text
    • https://zeginuvo.weebly.com/uploads/1/3/0/7/130775519/nugimotudovin.pdfIn PDF document text
    • https://besiwalufeg.weebly.com/uploads/1/3/2/6/132696214/08e194ef7696ae.pdfIn PDF document text
    • https://dutitujazekap.weebly.com/uploads/1/3/0/8/130814390/f9007.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://uploads.strikinglycdn.com/files/b95782f6-7e3b-4418-b909-d34cd0741a38/83547014366.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/5db6d23d-d3eb-4d8d-8aca-e4ff4f5735f3/kuzikiwukaral.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/9888/9621/files/crystal_cave_wisconsin_pictures.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0500/1229/1264/files/20992544929.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0495/6245/2124/files/17120761457.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0481/2754/1409/files/bioisosteres_in_medicinal_chemistry.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0483/9669/7768/files/91860230962.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0483/9473/1688/files/project_management_pinto_4th_edition.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0268/7801/7724/files/vagedomowunox.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0439/5394/6782/files/dusumunenixolewekesodumit.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0440/1856/5278/files/86383886708.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0437/2040/9256/files/s_and_r_configuration.pdfIn PDF document text
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#In PDF document text
    • http://purl.org/dc/elements/1.1/In PDF document text
    • http://ns.adobe.com/pdf/1.3/In PDF document text
    • http://ns.adobe.com/xap/1.0/In PDF document text
    • http://ns.adobe.com/xap/1.0/mm/In PDF document text
    • http://ns.adobe.com/xap/1.0/rights/In PDF document text
    • http://scripts.sil.org/OFLIn PDF document text

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00006225.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6225 5232 bytes
SHA-256: 442937cc15626d057c5dc6c7eefbcfb76622ed0cb07f049753f08b01188417fb
font_01_sfnt_off000073d8.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x73D8 9212 bytes
SHA-256: 5256a0bf6b9d97aab75e9bbdf868ea60b9507d8afc7bcb1654f5f7ce7c6f7a43

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